Robert Gauthier / Los Angeles Times
Early on in the proceedings, the performers all made mention of music's recent losses. Bruno Mars, above, honored Whitney Houston while Bonnie Raitt and Alicia Keys paid musical tribute to Etta James. Stevie Wonder also paid tribute to Whitney, while Common took a moment to commemorate Gil Scott-Heron. Later on, Jennifer Hudson sang a tribute to Whitney Houston and LL Cool J and Questlove paid their respects to "Soul Train" host Don Cornelius.